gwepdecrypt.cpp

About WepDecrypt: Wepdecrypt is a Wireless LAN Tool written in c which guesses WEP Keys based o

		Win->output_buffer->append("\nYou must supply a Crack Mode");
		return;
	}
	
	if (Win->mac_button->value()){
		if (!Win->mac_input->size()){
			Win->output_buffer->append("\nMac can't be empty");
			return;
		}
		if (!strncmp(Win->mac_input->value(), "Mac Filter", 10)){
			Win->output_buffer->append("\nYou must supply a Mac");
			return;
		}
			
		//fprintf(stdout, "-b %s ", Win->mac_input->value());
		sprintf(command[i], "-b%s", Win->mac_input->value());
		i++;
	}
	
	if (Win->client_button->value()){
		if (!Win->server_data_input->size()){
			Win->output_buffer->append("\nServer data can't be empty");
			return;
		}
		if (!strncmp(Win->server_data_input->value(), "Client Mode", 11)){
			Win->output_buffer->append("\nYou must set server data");
			return;
		}
		strncpy(server_data, Win->server_data_input->value(), 30);
		
		// Check server data
		for (j=0;j<strlen(server_data);j++){
				if (server_data[j] == ':') break; 
		}
		if (j==strlen(server_data) || j==(strlen(server_data) - 1)){
			Win->output_buffer->append("\nBad client connection data");
			return ;
		}
		
		// Check server
		//fprintf(stdout, "-c %s", Win->server_data_input->value());
		sprintf(command[i], "-c%s", Win->server_data_input->value()); i++;
		sprintf(command[i], "-l0"); i++;
	}
	
	if (Win->blocks_to_decrypt_button->value()){
		if (!Win->client_button->value()){
			Win->output_buffer->append("\nYou have to set the client data");
			return;
		}
		if (!Win->blocks_to_decrypt_input->value()){
			Win->output_buffer->append("\nYou have to set the number of blocks to get\n from the server");
			return;
		}
		sprintf(command[i-1], "-l%i", Win->blocks_to_decrypt_input->value()-1);
		
	}
	
	if (Win->generator_mode_button->value()){
		if (!Win->generator_mode_input->value()){
			Win->output_buffer->append("\nYou have to set the generator mode");
			return;
		}
				
		switch(Win->generator_mode_input->value()){
			case 1:
				sprintf(command[i], "-dall");
				break;
			case 2:
				sprintf(command[i], "-dalpha");
				break;
			case 3:
				sprintf(command[i], "-dalphanumeric");
				break;
			case 4:
				sprintf(command[i], "-dnumeric");
				break;
			case 5:
				sprintf(command[i], "-drandom");
				break;
			case 6:
				sprintf(command[i], "-dprintable");
				break;
		}
		i++;
	}
		
	
	if (Win->num_net_button->value()){
		if (!Win->num_net_input->value()){
			Win->output_buffer->append("\nYou must set a Number network");
			return;
		}
		//fprintf(stdout, "-n %i ", Win->num_net_input->value());
		sprintf(command[i], "-n%i", Win->num_net_input->value());
		i++;
	}
	
	if (strncmp(Win->firstkey_input->value(), "First Key", 8) != 0){
		if (!Win->firstkey_input->size()){
			Win->output_buffer->append("\nFirst Key can't be empty");
			return;
		}
		//fprintf(stdout, "-i %s ", Win->firstkey_input->value());
		sprintf(command[i], "-i%s", Win->firstkey_input->value());
		i++;
	}
	
	if (strncmp(Win->lastkey_input->value(), "Last Key", 7) != 0){
		if (!Win->lastkey_input->size()){
			Win->output_buffer->append("\nLast Key can't be empty");
			return;
		}
		//fprintf(stdout, "-e %s ", Win->lastkey_input->value());
		sprintf(command[i], "-e%s", Win->lastkey_input->value());
		i++;
	}
	
	//fprintf(stdout, "\n");

#ifndef __CYGWIN__
	if ((test_file=open("/usr/bin/wepdecrypt", O_RDONLY)) == -1){
		Win->output_buffer->append("\nWepdecrypt executable can't be found\nplease install it at /usr/bin/");
		return;
	}
	else
		close(test_file);
#else
	if ((test_file=open("wepdecrypt.exe", O_RDONLY)) == -1){
		Win->output_buffer->append("\nWepdecrypt executable can't be found\nplease install it at the same directory\nas gwepdecrypt");
		return;
	}
	else
		close(test_file);
#endif
	
	command[i] = NULL;
	
	Fl::add_fd(STDIN_FILENO, fd_ready, (void*)Win);
	pipe(Win->pipefd);
	
	Win->output_buffer->append("\nProcessing ...\n");
	Win->child_pid = fork();
	
	if (Win->child_pid == -1){ // Error
		fprintf(stderr, "Error fork()\n");
		exit(0);
	}
	
	if (!Win->child_pid){
		dup2(Win->pipefd[1], STDOUT_FILENO);

		close(Win->pipefd[0]);
		close(Win->pipefd[1]);

#ifndef __CYGWIN__
		execv("/usr/bin/wepdecrypt", command);
#else
		execv("wepdecrypt.exe", command);
#endif

	}
	
	if (Win->child_pid){
		dup2(Win->pipefd[0], STDIN_FILENO);
		fcntl(STDIN_FILENO, F_SETFL, O_SYNC| O_NONBLOCK);
		close(Win->pipefd[0]);
		close(Win->pipefd[1]);		
	}
}

void stop_cb(Fl_Widget * , void * v){
	MainWindow * win = (MainWindow *) v;
	
	if (!win->child_pid) return;
	
	size = 0;
	kill(win->child_pid, SIGINT);
	win->child_pid=0;
}

#ifndef __CYGWIN__
void about_cb(Fl_Widget *, void * ){
	char ** argv;
	
	if (show_about == 0) {
		Fl_Window * about_window = new Fl_Window(205,95);
		Fl_Multiline_Output * about_box = new Fl_Multiline_Output(10, 10, 185, 55, NULL);
		Fl_Button * ok = new Fl_Button(85, 70, 40, 20, "OK");
		
		show_about = 1;
				
		about_box->value(" Gwepdecrypt version 0.3\n        Wepdecrypt's gui\n       by Fernando Tarin");	
	
		about_window->label("About");
		about_window->end();	
    
		
		about_window->show(1, argv);	
	
		Fl::focus(ok);
		ok->shortcut(FL_Enter);
		ok->callback(close_about_window_cb, (void *) about_window);
		Fl::run();
	}
}

void close_about_window_cb(Fl_Widget * v , void * w){
	Fl::delete_widget((Fl_Widget *) w);
	show_about = 0;
}
#endif

void version_cb(Fl_Widget *, void * v){
	int test_file;
	char version[25];
	
	MainWindow * Win = (MainWindow *) v;
	
	if (Win->child_pid) return;
		
	Win->output_buffer->remove(0, Win->output_buffer->length());
	Win->output_buffer->append("- WepDecrypt Gui -\n");
	
	sprintf(version, "\nGwepdecrypt version %s", VERSION);
	Win->output_buffer->append(version);
	Win->output_buffer->append("\nWepdecrypt graphic user interface\n\n");
	
#ifndef __CYGWIN__
	if ((test_file=open("/usr/bin/wepdecrypt", O_RDONLY)) == -1){
		Win->output_buffer->append("\nWepdecrypt executable can't be found\nplease install it at /usr/bin/");
		return;
	}
	else
		close(test_file);
#else
	if ((test_file=open("wepdecrypt.exe", O_RDONLY)) == -1){
		Win->output_buffer->append("\nWepdecrypt executable can't be found\nplease install it at the same directory\nas gwepdecrypt");
		return;
	}
	else
		close(test_file);
#endif
	
	Fl::add_fd(STDIN_FILENO, fd_ready, (void*)Win);	
	pipe(Win->pipefd);
	Win->child_pid = fork();
	
	if (Win->child_pid == -1){ // Error
		fprintf(stderr, "Error fork()\n");
		exit(0);
	}
	
	if (!Win->child_pid){
		dup2(Win->pipefd[1], STDOUT_FILENO);

		close(Win->pipefd[0]);
		close(Win->pipefd[1]);

#ifndef __CYGWIN__
		execl("/usr/bin/wepdecrypt", "wepdecrypt", "-v", NULL);
#else
		execl("wepdecrypt", "wepdecrypt", "-v", NULL);
#endif
		
	}
	
	if (Win->child_pid){
		dup2(Win->pipefd[0], STDIN_FILENO);
		fcntl(STDIN_FILENO, F_SETFL, O_SYNC| O_NONBLOCK);
		close(Win->pipefd[0]);
		close(Win->pipefd[1]);
		Win->child_pid = 0;
	}
}

void help_cb(Fl_Widget *, void * v){
	MainWindow * Win = (MainWindow *) v;
	
	if (Win->child_pid) return;
		
	Win->output_buffer->remove(0, Win->output_buffer->length());
	Win->output_buffer->append("- WepDecrypt Gui -\n");
	
	
	Win->output_buffer->append("\nGwepdecrypt options:\n");
	Win->output_buffer->append("--------------------------------------------------\n");
	Win->output_buffer->append("1. Dump file (filename):  network dumpfile to read\n");
	Win->output_buffer->append("2. Word file (filename):  wordlist to use as passwords\n");
	Win->output_buffer->append("3. Mac Filter (mac_addres): Filters the mac address from the dump file\n");
	Win->output_buffer->append("4. Mode: run wepdecrypt in diffente modes\n");
	Win->output_buffer->append("5. Client Mode (server:port): Host and port where server is running\n");
	Win->output_buffer->append("6. Number blocks: sets the number of blocks to get from the server\n");
	Win->output_buffer->append("7. Generator Mode: sets the mode for the key generator\n");
	Win->output_buffer->append("8. Number Network: network number to attack\n");
	Win->output_buffer->append("9. First key: specifies the first key\n");
	Win->output_buffer->append("10. Last key: specifies the final key\n");
	Win->output_buffer->append("--------------------------------------------------");
}

void sigchld(int sign){	
	waitpid(-1,NULL,WNOHANG);
}

void set_log_options(LogFile *log, MainWindow *win){
	char * home, config_file[75], message[100];
	FILE * fp;
	
#ifndef __CYGWIN__
	home = getenv("HOME");
	sprintf(config_file, "%s/.wepdecrypt", home);
#else
	sprintf(config_file, "wepdecrypt.conf", home);
#endif
	
	if ((fp = fopen(config_file, "r")) == NULL){

#ifndef __CYGWIN__
		strncpy(log->directory, "/tmp/", 6);
#else
		strncpy(log->directory, ".\\", 3);
#endif

		if ((fp = fopen(config_file,"w+")) == NULL){
			sprintf(message, "\nError in config file:\nCan't create config file");
			win->output_buffer->append(message);
			return;
		}
		fprintf(fp,"#Wepdecrypt configuration file\n");
		fprintf(fp,"#Server listening port\nPort=3617\n\n#Blocksize can be set up to 1099511627775\nBlocksize=4294967296\n\n#Full path to server logfile\nLogfile=/var/tmp/wepdecrypt_s.log\n\n#Verbosity levels: 1 - LOW 2 - MEDIUM 3 - HIGH\nVerbosity=2\n\n"
				   "#Full path to directory where gui generated logs will be saved\nGuidirlog=%s\n\n", log->directory);
		fclose(fp);
		return;
	}
	
	else{

		if (!manage_config_file(0, NULL, NULL, NULL, NULL, log->directory)){
			sprintf(message,"\nBad data in config file:\nPlease delete %s",config_file);
			win->output_buffer->append(message);

#ifndef __CYGWIN__
			strncpy(log->directory, "/tmp/", 6);
#else
			strncpy(log->directory, ".\\", 3);
#endif

			return;
		}
		
		if ((fp = fopen(config_file, "a")) == NULL){
			if (!strlen(log->directory)){

#ifndef __CYGWIN__
				strncpy(log->directory, "/tmp/", 6);
#else
				strncpy(log->directory, ".\\", 3);
#endif

			}
			sprintf(message,"\nError in config file:\nCan't append data to config file");
			win->output_buffer->append(message);
			return;
		}
		
		if (!strlen(log->directory)){

#ifndef __CYGWIN__
			strncpy(log->directory, "/tmp/", 6);
#else
			strncpy(log->directory, ".\\", 3);
#endif

			fprintf(fp, "#Full path to directory where gui generated logs will be saved\nGuidirlog=%s\n\n", log->directory);
		}
		
		fclose(fp);
		return;		
	}
}

void set_log_dir(Fl_Widget *, void * v){
	int verbosity, port;
	char * dir_name, * home, config_file[75];
	char block_size[15], log_file[55];
	FILE * fp;

#ifndef __CYGWIN__
	DIR * dir;
#endif

	LogFile * log = (LogFile *) v;
	
	
	dir_name = fl_dir_chooser("Choose a Directory", NULL, 0);
	if (dir_name != NULL){
		strncpy(log->directory, dir_name, strlen(dir_name)+1);

#ifndef __CYGWIN__
		if ((dir=opendir(log->directory)) == NULL){
			strncpy(log->directory, "/tmp/", 6);			
		}
#endif

		chdir(log->directory);

#ifndef __CYGWIN__		
		home = getenv("HOME");
		sprintf(config_file, "%s/.wepdecrypt", home);
#else
		sprintf(config_file, "wepdecrypt.conf");
#endif
		
		manage_config_file(0, &port, block_size, &verbosity, log_file, NULL);
		
		fp = fopen(config_file,"w+");
		fprintf(fp,"#Server listening port\nPort=%i\n\n#Blocksize can be set up to 1099511627775\nBlocksize=%s\n\n#Full path to server logfile\nLogfile=%s\n\n#Verbosity levels: 1 - LOW 2 - MEDIUM 3 - HIGH\nVerbosity=%i\n\n"
				   "#Full path to directory where gui generated logs will be saved\nGuidirlog=%s\n\n", port, block_size, log_file, verbosity, log->directory);
		fclose(fp);

#ifndef __CYGWIN__
		if (dir != NULL) closedir(dir);
#endif
		
	}
}

int manage_config_file(int mode, int * port, char * block_size, int * verbosity, char * log_file, char * guidirlog){
	int i, j;
	char * home, config_file[75], conf_setting[20], conf_value[75], line[95];
	FILE * fp;
	
#ifndef __CYGWIN__
	home = getenv("HOME");
	sprintf(config_file, "%s/.wepdecrypt", home);
#else
	sprintf(config_file, "wepdecrypt.conf");
#endif
	
	fp = fopen(config_file, "r");
	
	while(!feof(fp)){			
		i = 0; j = 0;
		while (i < 94){
			line[i] = fgetc(fp);
			if (line[i] == '\n') break;
			i++;
		}
		line[i] = '\0';			
		if (line[0] == '#' || line[0] == '\n' || line[0] <= '\0') continue;
		i = 0;			
		while ((line[i] != '=') && (i < 19)){
			conf_setting[i] = line[i];
			i++;
		}			
		conf_setting[i] = '\0'; i++; 			
		while ((line[i] != '\0') && (i < 95) && (j < 74)){				
			conf_value[j] = line[i];
			j++; i++;
		}
		conf_value[j] = '\0';
			
		if (strncmp(conf_setting,"Port",4) == 0) { if (port != NULL) (*port) = atoi(conf_value); }
		else if (strncmp(conf_setting,"Blocksize",9) == 0) { if (block_size != NULL) strncpy(block_size, conf_value, strlen(conf_value)+1); }
		else if (strncmp(conf_setting,"Verbosity",9) == 0) { if (verbosity != NULL) (*verbosity) = atoi(conf_value); }
		else if (strncmp(conf_setting,"Logfile",7) == 0) { if (log_file != NULL) strncpy(log_file, conf_value, strlen(conf_value)+1); }
		else if (strncmp(conf_setting,"Guidirlog",9) == 0) {if (guidirlog != NULL) strncpy(guidirlog, conf_value, strlen(conf_value)+1); }
		else{
			//Bad data in config file			
			fclose(fp);
			return 0;
		}
	}
	
	return 1;
	fclose(fp);
}